This is an activity about the Doppler effect. Learners will use long springs or ropes to examine the frequency and wavelength of various waves. Then, they will observe a demonstration of the Doppler effect for sound waves, using this understanding...(View More) to investigate the shifted spectra of sample galaxies. Finally, learners will user their data to create a graph of distance versus recession speed, illustrating Hubble’s Law regarding the expansion of the Universe. This is Actividad 8.3 as part of El Universo a Sus Pies, a Spanish-language curriculum, available for purchase.(View Less)

This is an activity about the expansion of the Universe. Learners will use a special set of transparency and master sheets with dots representing clusters of galaxies at two different eras of the Universe's history. After aligning the transparency...(View More) and underlying page, learners then observe and measure clusters moving away from particular locations, graph their data, compute a slope and relate the slope to the age of the Universe. This is Actividad 8.4 as part of El Universo a Sus Pies, a Spanish-language curriculum, available for purchase.(View Less)

This is an activity about the Doppler effect. Learners will use long springs or ropes to examine the frequency and wavelength of various waves. Then, they will observe a demonstration of the Doppler effect for sound waves, using this understanding...(View More) to investigate the shifted spectra of sample galaxies. Finally, learners will user their data to create a graph of distance versus recession speed, illustrating Hubble’s Law regarding the expansion of the Universe. This is Activity H-8 of Universe at Your Fingertips 2.0: A Collection of Activities and Resources for Teaching Astronomy DVD-ROM, which is available for purchase.(View Less)

This is an activity about the expansion of the Universe. Learners will use a special set of transparency and master sheets with dots representing clusters of galaxies at two different eras of the Universe's history. After aligning the transparency...(View More) and underlying page, learners then observe and measure clusters moving away from particular locations, graph their data, compute a slope and relate the slope to the age of the Universe. This is Activity H-6 as part of The Universe At Your Fingertips 2.0 curriculum, available for purchase on DVD.(View Less)